class Fib(object):
	
	def __getitem__(self, n):
		if isinstance(n, int):
			a, b = 1, 1
			for x in range(n):
				a, b = b, a + b
			return a
		if isinstance(n, slice):
			start = n.start
			stop = n.stop
			if start is None:
				start = 0
			a, b = 1, 1
			L = []
			for x in range(stop):
				if x >= start:
					L.append(a)
				a, b = b, a + b
			return L

f = Fib()
print(f[0])
print(f[5])
print(f[100])
print(f[0:5])
print(f[0:10])
		